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Welcome to AX84® the base camp for tube (valve) electronics hobbyists.

AX84 exists to provide:

1) A great environment to learn about music-related electronics in general. AX84 is a place where those with experience are interested in helping diligent beginners who are willing to do their homework.

2) A place where those with more experience can field their ideas to peers and get useful feedback.

3) An environment that respects the past, but is not enslaved by it. INNOVATION IS GOOD (and it didn't die in the 1950s.) There are new things under the sun every day. Move the ball forward!

Our HUGE discussion area is under 'Discussion Forum' to your left.

We are hard at work improving the site- check back often!

Recent Forum Threads
"Curved / Semi-circular tag strips?"
Posted By tristanc on 08/25/2016
Do such things exist? If not, does anyone know if it is possible to bend the straight tag strips using a heat gun or the like?

Reviewing my attempt at a P2P build (and also realising the value of s...

Discuss this entry
"Preamp idea with Schematic"
Posted By Rudder on 08/25/2016
Hi guys,

I've been wondering about this idea for a while and after doing some research and general/basic test I've come up with the following idea. Would you guys be able to take a look at the sche...

Discuss this entry
"Modelling tubes with uTracer"
Posted By electronrancher on 08/24/2016
So I built a uTracer a while back, and after modelling the few oddball tubes I wanted to simulate in spice, it's beginning to collect dust. So sad!

So if anyone would like a spice model for a tube ...

Discuss this entry
"Cathode follower stages in an SVT power amp"
Posted By ColinD on 08/24/2016
Reference schematic:
I'm struggling to wrap my head around the cathode follower stages that drive the power tubes in this amp. The secon...

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"Multiple inputs and grounding"
Posted By musashi on 08/24/2016
I'm reading in Merlin's writings that a correct way of grounding is by placing a SINGLE chassis to ground connection at the input jack.

How can I have a single ground chassis connection at the inpu...

Discuss this entry
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Updates: Sat, Aug 27th, 2016 @ 08:25:23
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Site News

2014-10-21: Be sure to check out our discussion forum using the link on the left..

2014-10-20: The Treasure Fleet is on the way to Rio De La Hacha with a fortune in gold!

We're looking for media clips of recent builds... please stop by the forum and respond to the thread.

2008-10-4: Archived Projects section is functional again.

2008-9-18: RSS Feeds for the forum have been up for a while, but not advertised...
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2008-6-26: Want to participate in our discussion forums? You are welcome to read and lurk as you like. If you think you'd like to post with regularity, please sign up for an account.

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